AirHint found the following cheapest return flights from Miami (MIA) to Rio Negro (MDE) in September 2025 (see full year).

Return flights

03 Sep - 20 Sep	Avianca	direct
03 Sep - 24 Sep	Avianca	direct
10 Sep - 17 Sep	Avianca	direct
08 Sep - 12 Sep	Avianca	direct
13 Sep - 20 Sep	Avianca	direct
04 Sep - 09 Sep	Avianca	direct
12 Sep - 15 Sep	Avianca	direct
03 Sep - 14 Sep	Avianca	direct
03 Sep - 13 Sep	Avianca	direct
19 Sep - 08 Oct	Avianca	direct
05 Sep - 08 Sep	Avianca	direct
19 Sep - 19 Oct	Avianca
20 Sep - 19 Oct	Avianca
26 Sep - 03 Oct	Avianca	direct

Also check the deals for one-way flights from Miami to Rio Negro in September.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from Miami to Rio Negro in September from 199€

Return flights